Electric connection for multiple wireless telegraphy.



S. EISENSTEIN.

ELECTRIC CONNECTION FOR MULTIPLE WIRELESS 'IIELBGRAPHY.

APPLICATION FILED NOV. 9, 1907.

950,25, Patented Feb. 22, 1910.

WITNESSES a snsottnzo connection "son 'MoL'rzr'L wmms Tenses-Anny,

T at! whomt may renown: f1 it known that I, SIM N- Elsnxsrniij, a citizen of the Empirefof Russia, residing at No. Prorcsnoje, Kiew, Russisfhav e in} 'enteo. certain new and useful Improi'ements ole-ting to Electric Connections for Millple liireless Telegraphy, of which the folhwing is s specification. i 1 The present invention has for its object a: system of electrical connections for multiple wireless telegraphy with a small'con: si'iinction for the aerial conductor, .j'

in the known systems "of multiple teleg-. rephy a multiple form of aerial conductor usual but this, owing tothe; increase of the dimensions of the masts, gives rise to I for the-vibrations considerably greater expenditure of money. in accordance tho serisieonduct-oris constructed 1n enumofbrunehes which are utilizedeitheu separately or together for despatching mes-- stages of tlifi'erent wave lengths, the separate branches being connected with one or more antennae or not to earth over capacities so that as the arrangement and construction a number of antennae presents no clifiieulties, because as is known -they,a're suspentleoi from short rods and are readily accessible, the cost is considerablyreducedf In the accompanying drawing, Figure]. shows diagrammatically a means of-connection construct-etlaooording to the invention,

Figs. 2 and 3 are diagrams illustrating the vibration of the system, Fig. 4 shows-dia grammatically another form of apparatus, Fig. 5 shows a further modified form, and Figs. 6 and '4' are diagrams illustrating the action of the apparatus shown in Fig, 5.

in Fig. l the known vibration cirouit' 'A is in resonance with the aerial L and with the antenna G, so that by means of this system aiiefinite w ve length can be produced. As

* indicated in. the drawing, the aerial G lies in a horizontal plane. The vibration of this system is illustrated diagrammatically in FL) 2 in. which the curve shown in broken lines represents the special tension, while the ourve shown in mixed lines represents the strength of the current. I and'II are the two )ranches of the aerial conductor structure. At the point P, where the gone tion or nodal-point of the tension is located,

x n si i on additional h scnoh stl'noture is arranged the some onion n snns'rnm,

cuit the intermediary of a small ing path F, this portion with the present invention:

PATENT? one-ion 0F KIEW', RUSSIA.

i ueenteosenlse, into.-

sparkof the. structure of mg grounded at E.

the "aerial conductor he lThe' curves indicated by V indicate cuivcs of, tension, whiie those indicated by J indicate the Stlfiilgih of the current. N ow {IS no difi'erence of tension can exist between ,theesrth andthe vpoint- P where the nodal point of the tension oithclbelly of the current isio-csted it is obvious that this earth ooirinection must remain without any in fiu'ence upon the vibrations produced in the vibration" circuit A owing to the provision of the sinuil sparking p'a-th F in the nodal point of-the tension. The earth connection 'msy therefore bsregarded as non-existent oro sl uoecl by the vibration circuit A. Winn,

1 owever, after ashort intervsl oftinie, after the vibrationof the. first wave which has been produced by the vibration circuit A in accordance with ainy known method, as already repeatedly snggestedby the inventor, fresh vibrotions, which ma be of clifierent wavelengths, are produce by the vibration circuit 3, with this excitation the antennae L and Ginust eoiiperate as a common antenna with the earth E. By the arrangement of the earth connection in the nodal point otthe vibration tension of the horizontal antenna, system of the aerialconducttincomplete monotony'of the vibration process of the vibrations produced by the vibration-circuit B must be insured. Fig.

3 illustrates diagrammatically the. vibrntion recess of this second vibration, The blfitl'lc es 1 and H of the common antennapresent the some self vibrations and in acin such a manner that the branches I and I I vibrate together in a half Wave length of the vibration produced by the vibration cirof the serial. conductor therefore merely acts with the branches 1" endll', without the earth .oortisnce with Fig. 2 the point- P is selected conneotioh being able to exert any influence whatever, in View of the small. spttrltingpath 13, while during .;a vibrationprocess succeeding the first inpoint ofti-me and produced by the vibration cirly ,5

the interposition of' m gseL and Gent as-scommon I 5 nit; is'obvious wlth 5 out further explanation that the earth con-' nection can be replaced by a second antenna similar to the antenna'G, In this case it .is also easy to find the nodal point of the of connection for producing three waves.-

Thearrangement is substantiallythe same as in Fig. 1 and the aerial L acts in-common with the antennae G and G as antenna and vibrates in resonance with theantenna G when a wave is produced in the vibration circuit C. It is therefore obvious that a simple small aerial conductor structure may be utilized for the purpose of multiple telegraphy without entailing any strengthening or en largement of the masts. .As already stated, the construction of a number of antennae presents no difficulties as they are suspended on small rods so that they are readily accessible. On the other hand the local conditions as regards the suspension of a number of antennae are sometimes unfavorable. When however a good earth can be provided, the method of connection as described above may be formed by connecting condensers of equal capacity in place of the antennae, as shown diagrammatlcally in Fig. 5. It must, however, be remembered that it is a known factthat an aerial conductor which vibrates with the earth has the nodal point of the tension in the earth, so that in interposing a capacity at the earth connection the nodal point itself is rendered higher. This is diagrammatically represented in Figs. 6 and 7 vwhich illustrate the vibration process, and

in conjunction with what has been stated above these figures should be readily intelligible Without further description. The points P P l? in Fig. 5 of course presentthe same properties as the point P in Fig. 1, that is to say it should not present any tension difi'ercnces and must therefore be independent of the succeeding vibration circuits.

claim as new and desire to secure by Letters conductor with all its branches acts as a common antenna.

2. In-wireless .telegraphy, an aerial conductor divided-into a number ofbranches' eachofwhieh is connected with an antenna, v each of the branches being connected at'certain times to the-nodal point oftheVibriition circuit tor the time being.

3.- In wireless telegraphy. an aerialcom ductor having a number or branches connected with suitable capacities, each of said branches being connected at certain times tov the nodal point of; the vibration tension oi" the vibration circuit for the time being, and

vibration circuits having therein condensers and connecting with certain of said branches.

4:."In'wireless telegraphy, an aerial .co'nduct'or divided into a number of branches partly connected with antennae and partly with .the earth, said branches being connected atcertain times to the nodal point of the vibration tension of the vibration circuit for the-time being. v O

5. In wireless telegraphy, an aerial conductor comprising a number of branches each connected at certain times to'the'nodal,

point of the vibration tensionof the vibration circuit for the time being, certain of said branches being connected with the earth and having condensers therein.

In testimony, that Iclaim the foregoing as my invention, I have'signed my name in presence of two subscribing witnesses.

SIMON EISENSTEIN.

\Vitnesses Anrnu'n W. S ITH, GEORGE A. APPLETON. 

